Degrees of freedom of uplink-downlink multiantenna cellular networks

2014 IEEE International Symposium on Information Theory Pub Date : 2016-02-12 DOI:10.1109/TIT.2016.2529839

Sang-Woon Jeon, Changho Suh

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引用次数: 16

Abstract

An uplink-downlink cellular network is studied in which the first base station (BS) with M₁ antennas receives independent messages from its N₁ serving users, while the second BS with M₂ antennas transmits independent messages to its N₂ serving users. Each user is assumed to have a single antenna. Under this uplink-downlink setting, the sum degrees of freedom (DoF) is completely characterized as the minimum of (N₁N₂ + min(M₁,N₁)(N₁ - N₂)⁺ + min(M₂,N₂)(N₂ -N₁)⁺)/ max(N₁,N₂), M₁ + N₂,N₁ + M₂, max(M₁,M₂), and max(N₁,N₂), where a⁺ denotes max(0, a). The result demonstrates that, depending on the network configuration, operating one of the cells as uplink and the other cell as downlink can improve DoF compared to the conventional uplink or downlink operation, in which both cells operate as either uplink or downlink.

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上行-下行多天线蜂窝网络的自由度

研究了一种上行下行蜂窝网络，其中具有M1天线的第一基站接收来自N1服务用户的独立消息，而具有M2天线的第二基站向其N2服务用户发送独立消息。假设每个用户都有一个天线。在此上行下行设置下，自由度总和(DoF)完全表征为(N1N2 + min(M1,N1)(N1 - N2)+ + min(M2,N2)(N2 -N1)+)/ max(N1,N2)， M1 + N2,N1 + M2, max(M1,M2)， max(N1,N2)的最小值，其中a+表示max(0, a)。结果表明，根据网络配置，将一个小区作为上行，另一个小区作为下行操作相比于传统上行或下行操作可以提高DoF。其中两个单元都作为上行链路或下行链路运行。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2014 IEEE International Symposium on Information Theory

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